package com.ynny.abstract_;

public abstract class BubbleTea {
        public abstract void BubbleTea();
        public abstract void addstep();
        public void step(){
            System.out.println("准备牛奶和茶叶");
            System.out.println("加牛奶");
            System.out.println("加茶叶");
            System.out.println("包装");
        }
    }


